I just replaced the toner cartridge and the LCD continues to display the message "Toner Life End" or "Replace Toner".

I print mainly black and white documents. How can I stop the life of my color toner cartridges from decreasing when I print?

What is the difference between the toner cartridge and the drum unit?

Replace Belt unit

Replace WT (waste toner) Box

Replace Drum

Replace Toner

I still receive the error message "Replace Drums", "Replace Drum(X)", "Drum End Soon", or "Drum End Soon(X)" after I replace the drum unit with a new one.

Can I buy any MICR toner?